From: Michael Gernoth <michael@gernoth.net>
Date: Sun, 22 Aug 2010 22:59:13 +0000 (+0200)
Subject: make sure i2c rxbuf does not overrun
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/rsbs2/commitdiff_plain/a44532dcb9a05fa29eaed0728cd0543750e47081

make sure i2c rxbuf does not overrun
---

diff --git a/bmc/i2c.c b/bmc/i2c.c
index f081991..c5f587b 100644
--- a/bmc/i2c.c
+++ b/bmc/i2c.c
@@ -87,6 +87,11 @@ ISR (TWI_vect, ISR_BLOCK)
 #ifdef DEBUG
 			printf("I2C: Data received: 0x%02x\n", TWDR);
 #endif
+			if (i2c_pos >= sizeof(i2c_databuf)) {
+				TWCR_RESET;
+				i2c_pos = 0x00;
+				break;
+			}
 			i2c_databuf[i2c_pos] = TWDR;
 			i2c_pos++;
 			TWCR_ACK;